Sharpening or grinding device



Sept. 27, 1938. w. A. WEED 2,131,530

SHARPENING OR GRINDING DEVICE Filed Aug. 14, 1937 3 Sheets-Sheet l Sept. 27, 1938. w. A. WEED SHARPENING 0R GRINDING DEVICE Filed Aug. 14, 1957 3 sheets sheet 2 Sept. 27,- 1938.. w. A. WEED SHARPENING OR GRINDING DEVICE Filed Aug. 14, 19,57 3 Sheets-Sheet 3 Patented Sept. 27, 1938- UNITED STATES PATENT OFFICE Walter A. Weed, Orlando, Fla. Application August 14, 1937, Serial No. 159,191

6 Claims. (Cl. 51-220) My invention relates toa device for sharpening or grinding tools or the like.

An important object of the invention is to provide a device of the above which is adapted mentioned character for sharpening or grinding a tool having a double bevel or taper, and which is adjustable to obtain one desired bevel and may subsequently be rately the other bevel.

manipulated to produce accu- A further object of the invention is to provide a clamping device for holding the tool, with means to adjustably support the same and to readily permit of the tool being inverted for producing the double bevel or taper.

A further object of the invention is to provide a stand or support, for coaction with the work clamp, ment, to eifect the desired and which has a large range of adjustresults.

A further object of the invention is to provide a clamp which may be used for holding elongated work extending longitudinally of the clamp.

Other objects and advantages of the invention will be apparent during the ing description.

course of the follow- In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side bodying my invention,

Figure 2 is an exploded same,

elevation of apparatus emperspective view of the Figure 3 is a plan view of thesame,

Figure 4 is a vertical of Figure 3,

Figure 5 is a vertical of Figure 3,

section taken on line 4-4 section taken on line 55 Figure 8 is a plan view of the same,

Figure 9 is an exploded perspective view of the clamp embodied in such apparatus, and,

Figure 10 is a transverse |0|0 of Figure 8.

section taken on line In the drawings, wherein for the purpose of illustration are shown my invention, the numeral preferred embodiments of IO designates a vertical stand as a whole, comprising a horizontal base H, to be fixedly secured to port. Base II has ablock l2 to, having openings I 3, to

a table or like suprigidly secured therereceive vertical posts or shafts like.

Adapted to coact with the posts I4 is a carriage l6, shown as embodying blocks I7 and I8, rigidly secured together by any suitable means, and arranged at a right angle with relation to each other. In Figure 1, the block is is vertically disposed and is offset laterally with respect to the block ll, while the block I1 has its ends extending beyond the sides of the block H), as shown. The horizontal block l7, Figure 1, has vertical-open ings l9, to slidably receive the posts l4, and the block 11 has screw-threaded openings 29-to receive winged bolts 2|, to engage the posts [4 and thereby clamp .the block in the selected adjusted elevation upon the posts Id. The block l8, vertically arranged in Figure 1, has transverse or horizontal openings 2| and 22 formed therein, which are'spaced, as shown. The openings 2| and 22' are suitably spaced to receive the posts Hi, When the block I8 is horizontally arranged, as will be described.

Mounted upon the vertically adjustable carriage I6 is a supporting unit 23, which is vertically 'angularly adjustable and also horizontally longitudinally adjustable,.with respect to the block- I8. This supporting unit comprises spaced upper and lower horizontal rods 24 and 25, preferably cylindrical, and having corresponding ends inserted into openings 26 in a cross-head 27!, and clamped therein by bolts 28 or the like. Corresponding ends of this supporting unit are therefore rigidly connected, while its opposite ends are free and unconnected. The supporting unit as a Whole is approximately U-shaped. In the arrangement or adjustment shown in Figures 1 to 3 inclusive, the lower horizontal rod 25 is passed through the upper opening 26', and is slid- .able therein, to turn'upon its longitudinal axis or to move longitudinally therein.- The rod 25 is clamped in the selected adjusted position by a winged bolt 29 having screw-threaded engagement within a screw-threaded opening 39, one bolt 29 for each opening 2| and 22.

The numeral 32 designates a work clamp, as

l4, clamped therein by bolts l5 or the connected by means of winged bolts 39, passing through openings 39 formed in the upper jaw 33 and in lugs or blocks 49, rigidly attached to the upper jaw 33. The bolts 39 do not have screwthreaded engagements with the openings 39', but their lower ends have screw-threaded engagement within openings 4|, formed in the lower jaw 34 and blocks 42, rigidly attached thereto. When the jaws 33 and 34 are employed to hold an elongated blade 31 or the like extending transversely of the jaws, the jaws are transversely parallel and the work is properly clamped between the same by manipulation of the bolts 39. When these jaws are employed to hold elongated work extending longitudinally of the jaws, such work is arranged between the jaws in advance of the bolts 39 and the jaws are drawn together by manipulation of the bolts. The jaws are maintained transversely parallel by manipulating a bolt 44, having screw-threaded engagement with an opening 44' formed in the upper'jaw 33 and this bolt 44 will engage the lower jaw 34, behind the work. The bolt 44 is arranged out of alignment with the bolts 39 and rearwardly of the same, and there is a slight play between the bolts 39 and openings 39.

Preferably formed integral with the upper blocks 40 are knuckles 45, having horizontal openings 46, to slidably receive the upper rod 24, and knuckles 41 are preferably formed integral with the blocks 42 and have openings 43 to slidably receive the rod 24. Each pair of knuckles is therefore adapted to be slidably mounted upon the upper rod24, to turn thereon, and move longitudinally thereof, and to be removed from the rod. By this means, either pair of knuckles may be placed upon the rod 24 and one beveled face 31 of the blade 31 ground, afterwhich the clamp may be removed from the rod, inverted with out disturbing its holding engagement with the work 31, and the other pair of knuckles slidably mounted upon the rod 24 for grinding the other beveled face 31.

The numerals 49 and 59 designate vertically rotating grinding wheels, to be arranged at suitable distances upon one side of the supporting unit 23. a

The operation of the form of apparatus'shown inFigures 1 to 4 inclusive, is as follows:

The blade or work 31 is clamped between the jaws 33 and 34, and projects forwardly beyond the same, while the handle 38 extends rearwardly beyond the jaws to be grasped by the operator. The supporting unit 23 is angularly adjusted, so that its top is swung toward or from the grinding wheel, so that the bevel 31' of the blade will properly engage the periphery of the grinding wheel. The supporting element is now clamped to the carriage by manipulation of the bolt 29. The blade or work is now pressed into proper engagement with the grinder or grinders, as the clamp may be shifted longitudinally in proximity to either grinder, and after one bevel 31' is ground, the clamp is inverted and the other bevel 31 ground in a similar manner. When grinding work like the blade 31 having the handle 38, the work may be manipulated either by the handle 38 or by the operator engaging the clamp 32. When the clamp is holding shorter work extend- .ing transversely thereof, or elongated work extending longitudinally of the clamp, the, clamp is manipulated by the operator holding the same in his hand.

In Figure 6, the same apparatus is shown, but the parts are adjusted or assembled differently.

The carriage 16 has been turned for 90 so that the block I8 is horizontal and the block l1 vertical. The openings 2| and 22 are now. vertical and receive the vertical posts l4, which may be clamped therein by the bolts 29. The block [1, now vertically arranged, being offset laterally from the block I8 is farther from the grinding wheel, and since it is shorter, and has its intermediate portion secured to the block 18, it produces a stand which is much lower, and may be adjusted to a considerably lower position. The openings 19 in the block l1 are now horizontal and the upper opening receives the lower rod 25 of the supporting unit, slidable therein, and adapted to be clamped in position by the winged bolt 2|. The clamp'32 is mounted upon the upper rod 24 to turn and move longitudinally thereof, as explained. It is obvious that the carriage may be arranged with the block 18 in the horizontal position, and the block l1 upon the forward side of the posts 44, if desired.

In Figures '1 to 10 inclusive, I have shown an adjustable clamp wherein the jaws are shiftable to and from the knuckles, to vary their distance from the grinding wheel. In these figures, the numerals 51 and 52 designate upper and lower bars, provided with apertured knuckles 53, to slidably receive the upper rod 24 of the supporting unit 23, the entire clamp being invertible, as describedin connection with the first form of clamp. These bars .51 have recesses 5| for the free passage of work extending transversely of the clamp. The lower bar 52 carries vertical guide bars 54 rigidly secured thereto, for slidable engagement within vertical openings 55 formed in the upper bar 5l. Each upper and lower bar 5| and 52 carries a pair of horizontal guide pins 56, to be slidably mounted within openings 51 formed in upper and lower jaws and 59, corresponding to the jaws 33 and 34. The upper jaw 58 has vertical openings 60, receiving vertical bolts 6|, but having no screw-threaded engagement therewith, and thelower ends of these bolts have screw-threaded engagement within openings 62 formed in the lower jaw 59. It is thus apparent that the bolts 6| permanently connect the jaws 58 and 59 and are adapted to draw these jaws together. The upper jaw has a screwthreaded opening 63, having screw-threaded engagement with a bolt 64, to contact with the lower jaw to tilt the upper jaw or to prevent tilting, to retain the upper and lower jaws transe versely parallel when holding elongated work extending longitudinally thereof. The pairs of connected jaws, slidable upon the guide pins 56, are clamped in adjustment upon the lower guide pins 56 by bolts 65, engaging within screw-threaded openings 66. The swinging movement of the supporting element brings the work-holding clamp closer or farther from the rotary grinding wheel, andadjusts the angular position of the work with respect to the grinder. The jaws 5B and 59, being adjustable upon the guide pins 56 serve to increase the range of adjustment between the work and grinder. This adjustable clamp is adaptedfor use in connection with the stand, described in connection with the first form of clamp, in the manner previously presented.

It is to be understood that the forms of my invention herewith shown and described are to be taken as preferred examples of the same and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of my invention or the scope of the subjoined claims.

Having thus described my invention, what I claim is:

1. In a grinding device, a rotary grinder, a work clamp, a stand comprising spaced vertical posts, a carriage including vertical and horizontal parts which are ofiset laterally, the horizontal part having a pair of spaced openings to slidably receive the pair of vertical posts and the vertical part having spaced openings to slidably receive the vertical posts, means to clamp the horizontal part to one post when such part is mounted upon the posts, means to clamp the vertical part to one post when it is mounted upon the posts in a horizontal position, a supporting unit comprising spaced upper and lower rods, the lower rod being adapted tobe inserted Within one opening of either horizontal or vertical part, means to clamp the lower rod to either horizontal or vertical part when inserted in the opening thereof, and means to pivotally mount the clamp upon the upper rod.

2. In a grinding device, a clamp including opposed jaws, separate apertured knuckles secured to the jaws, adjustable means to draw the jaws together, and a support comprising a rod to receive thereon the apertured knuckle of one jaw and to also receive thereon the other separate apertured knuckle of the other jaw when the clamp is inverted.

3. In a grinding device, a work clamp, comprising opposed jaws, separate apertured knuckles carried by the jaws, adjustable means to draw the jaws together, a supporting unit comprising a pair of spaced rods, one rod slidably receiving thereon the knuckle of one jaw and also being adapted to receive thereon the separate knuckle of the other jaw when the clamp is inverted, and a support having an opening for adjustably receiving and holding the other rod.

4. In a grinding device, a rotary grinder, a

work clamp comprising opposed jaws, adjustable means to draw the jaws together, separate apertured knuckles secured to the jaws, a supporting unit comprising spaced rods, one rod being adapted to slidably receive thereon the apertured knuckle of one jaw and to slidably receive thereon the separate apertured knuckle of the other jaw when the clamp is inverted, a support to receive the other rod which is capable of turning therein, means to clamp the last named rod to the support, and means to adjust the support with respect to the rotary grinder.

5. In a grinding device, a rotary grinder, a work clamp including opposed jaws, separate apertured knuckles secured to the opposed jaws and extending outwardly from the work engaging faces of the same, adjustable means to draw the jaws together, a supporting unit comprising a pair of spaced rods, one rod being adapted to slidably receive thereon the knuckle of the one jaw and to slidably receive thereon the separate knuckle of the other jaw when the clamp is inverted, a stand, a carriage vertically adjustably mounted upon the stand and having an opening to adjustably receive the other rod, means toclamp the last named rod to the carriage, and means to clamp the carriage to the stand.

6. In a grinding device, a clamp including opposed jaws, the opposed jaws having openings formed therein, opposed bars arranged near the jaws, rods carried by the opposedbars and slidably mounted within the openings of the jaws, adjustable means to draw the jaws together, separate apertured knuckles secured to the opposed bars, and a support comprising a rod to receive thereon the apertured knuckle of one bar and also receive thereon the other separate apertured knuckle of the other bar when the clamp is inverted.

WALTER A. WEED. 

